JP4572739B2 - Rotation fluctuation absorbing damper pulley - Google Patents

Rotation fluctuation absorbing damper pulley Download PDF

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Publication number
JP4572739B2
JP4572739B2 JP2005147616A JP2005147616A JP4572739B2 JP 4572739 B2 JP4572739 B2 JP 4572739B2 JP 2005147616 A JP2005147616 A JP 2005147616A JP 2005147616 A JP2005147616 A JP 2005147616A JP 4572739 B2 JP4572739 B2 JP 4572739B2
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Japan
Prior art keywords
portion
hub
pulley
wall portion
elastic body
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Expired - Fee Related
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JP2005147616A
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Japanese (ja)
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JP2006322573A (en
Inventor
正興 守屋
幸伸 西山
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株式会社ジェイテクト
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H55/00Elements with teeth or friction surfaces for conveying motion; Worms; Pulleys; Sheaves
    • F16H55/32Friction members
    • F16H55/36Pulleys
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16HGEARING
    • F16H55/00Elements with teeth or friction surfaces for conveying motion; Worms; Pulleys; Sheaves
    • F16H55/32Friction members
    • F16H55/36Pulleys
    • F16H2055/366Pulleys with means providing resilience or vibration damping
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S474/00Endless belt power transmission systems or components
    • Y10S474/902Particular connection between rim and hub
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00Machine element or mechanism
    • Y10T74/21Elements
    • Y10T74/2121Flywheel, motion smoothing-type
    • Y10T74/2131Damping by absorbing vibration force [via rubber, elastomeric material, etc.]

Description

  The present invention relates to a rotation fluctuation absorbing damper pulley that absorbs rotation fluctuation transmitted from an engine such as an automobile and transmits the rotation to an auxiliary machine or the like.

  A part of the driving force from the engine of an automobile is transmitted to an auxiliary machine such as an alternator or a water pump through an endless belt from a pulley attached to the shaft end of the crankshaft. In general, the pulley is provided with a rotation fluctuation absorbing damper for absorbing the rotation fluctuation.

As this type of pulley with a rotational fluctuation absorbing damper, for example, a damper pulley described in Patent Document 1 or Patent Document 2 is known. These damper pulleys are connected to the outer periphery of a hub that is attached to the shaft end of the crankshaft and rotates integrally with each other via a first rubber-like elastic body, and the hub and the pulley are connected to a second rubber. It has the structure connected via the elastic body. The rotational vibration input from the crankshaft to the hub is attenuated by the first rubber-like elastic body, and the rotational fluctuation torque input from the crankshaft to the hub is sheared in the torsional direction of the second rubber-like elastic body. Rotation is transmitted to the pulley while absorbing by action.
JP 2001-159448 (paragraphs 0009 to 0011, FIG. 1) Japanese Patent No. 3155280 (page 4, FIG. 1)

  In the rotation fluctuation absorbing damper pulley described in Patent Document 1 or Patent Document 2 described above, the pulley moves in the axial direction during use due to deterioration of the rubber-like elastic body (16, 24) disposed between the pulley and the hub. Since it may be displaced, it is necessary to provide a thrust bearing (20, 50) for positioning the elastic body in the axial direction. For this reason, the number of parts of the damper pulley is increased, the structure is complicated, and the number of assembling steps is increased, resulting in a cost increase.

  The present invention has been made in order to solve the above-described conventional problems, and by inserting a pulley with a uniform elastic force from the front and rear in the axial direction by a pair of rubber materials with respect to the hub, the pulley is moved in the axial direction. It is an object of the present invention to provide a damper pulley for absorbing rotational fluctuation that does not require a bearing for positioning.

The invention according to claim 1 for solving the above-described problem is that an inertial mass is elastically connected to an outer periphery of a hub attached to a rotary shaft via a torsional elastic body, and relative rotation with respect to the inertial mass is performed. In a damper pulley in which a possible pulley and the hub are elastically connected via an elastic body for absorbing rotational fluctuation, the elastic body for absorbing rotational fluctuation is an axial member of the pulley with respect to the hub by a pair of rubber materials. sandwiched with equal elastic forces from the front and rear, and the said pulley hub is intended to elastically connecting the hub includes a cylindrical boss portion, which is concentrically positioned on the outer peripheral side of the boss portion A cylindrical hub part, a connecting part that connects the boss part and the hub part, and a wall part projecting from the boss part, the wall part of the hub part includes the connecting part and Having axially opposed walls The pulley is provided with support portions between the connection portion of the hub portion and the wall portion of the ring, and both axial sides of the support portion and the connection portion of the hub portion are provided. The pair of rubber materials are bonded and fixed between the wall portions of the ring .

  A second aspect of the present invention is characterized in that, in the first aspect, the pair of rubber materials of the rotational fluctuation absorbing elastic body is made of a rubber material having the same thickness.

According to a third aspect of the present invention, in the first or second aspect , the pulley is rotatably supported in a radial direction by a journal bearing interposed between the inertia mass or the hub. It is what.

The invention according to claim 4, in any one of claims 1 to 3, wherein the wall portion of the hub portion is composed of a horizontal wall portion extending parallel to the hub portion, the horizontal wall The ring is press-fitted and fixed to a portion, and the wall portion of the ring is a vertical wall portion facing the connecting portion of the hub portion in the axial direction, and the support portion of the pulley is connected to the connecting portion of the hub portion. It is provided so as to extend radially inward at an axially intermediate position with respect to the vertical wall portion.

According to the first aspect of the present invention, a ring having a wall portion facing the coupling portion in the axial direction is fixed to the wall portion of the hub portion, and the pulley includes a coupling portion of the hub portion and a wall portion of the ring. Since a pair of rubber materials are bonded and fixed between both sides of the support portion in the axial direction, the connecting portion of the hub portion, and the wall portion of the ring, the pulley is attached to the hub with the pair of rubber materials. The pulley and the hub can be elastically connected by sandwiching them with an equal elastic force from the front and rear in the axial direction, a bearing for positioning the pulley in the axial direction can be eliminated, and the number of parts can be reduced. In addition, with a simple configuration, the pulley can always be elastically held with an equal force from the front and rear in the axial direction.

  According to the second aspect of the present invention, since the pair of rubber materials of the rotational fluctuation absorbing elastic body are made of the same thickness rubber material, the pulley is axially moved with respect to the hub by the same thickness rubber material. The pulley can always be held elastically with an equal force from the front and back in the axial direction simply by sandwiching it from the front and rear, and in addition to reducing the number of parts, the durability of the elastic body for absorbing rotational fluctuations can be improved. it can.

  According to the invention of claim 3, since the pulley is rotatably supported in the radial direction by the journal bearing mounted between the inertia mass or the hub, in addition to the effect of claim 1, the pulley is the belt. Regardless of tension or the like, the crankshaft can be accurately held at a radial position where the center of rotation coincides.

According to the invention of claim 4, the wall portion of the hub portion consists of a horizontal wall portion extending parallel to the hub portion, the ring is press-fitted into the horizontal wall portion, the wall portion of the ring, the hub portion made from a vertical wall portion facing the connecting portion and the axial supporting portion of the pulley is provided so as to extend in Oite radially inwardly axially intermediate position between the connecting portion and the vertical wall portion of the hub portion Therefore, a pair of rubber materials can be bonded and fixed between the pulley support part, hub connection part and vertical wall part, and the pulley is elastically held with equal force from the front and back in the axial direction. can do.


  Embodiments of the present invention will be described with reference to the drawings. In FIG. 1, a damper pulley 10 is attached to, for example, a crankshaft (rotary shaft) of an automobile engine and is used with a V-belt suspended around the outer periphery. It is transmitted to various auxiliary machines mounted on the automobile via, for example, an alternator, a water pump, a cooler compressor, etc., and functions to drive these auxiliary machines.

  The damper pulley 10 includes a hub 11, an inertia mass 12 and a pulley 13 that are arranged concentrically with the hub 11 on the outer peripheral side of the hub 11, and a torsional elastic body 14 interposed between the hub 11 and the inertia mass 12. The rotation fluctuation absorbing elastic body 15 is interposed between the hub 11 and the pulley 13.

  The hub 11 extends in the radial direction connecting the cylindrical boss portion 11A, the cylindrical hub portion 11B concentrically located on the outer peripheral side of the boss portion 11A, and the boss portion 11A and the hub portion 11B. It consists of a connecting part 11C. Further, the boss portion 11A of the hub 11 is integrally formed with a horizontal wall portion 11D extending in parallel with the hub portion 11B, whereby the hub portion 11B, the connecting portion 11C, and the horizontal wall portion 11D are formed on the front side of the hub 11. A defined recess 11E is formed. A press-fitting ring 17 having an L-shaped cross section is press-fitted and fixed to the outer periphery of the horizontal wall part 11D, and the vertical wall part 17A of the press-fitting ring 17 is positioned at the opening of the concave part 11E, and has a predetermined axial direction with the connecting part 11C. It is opposed with a gap. Although not shown, the shaft end of the crankshaft is fitted and fixed to the inner periphery of the boss portion 11A, and the hub 11 is rotated integrally with the crankshaft.

  The outer diameter of the hub portion 11B is formed smaller than the inner diameter of the inertia mass 12, and the ring-shaped torsional elastic body 14 is tightened between the outer peripheral surface of the hub portion 11B and the inner peripheral surface of the inertia mass 12. It is press-fitted. As a result, the hub 11 and the inertia mass 12 are elastically connected via the torsional elastic body 14. The torsional elastic body 14 is formed of a rubber-like elastic material excellent in heat resistance and mechanical strength, and the torsional elastic body 14 attenuates vibration transmitted from the crankshaft. The outer peripheral surface of the hub portion 11B and the inner peripheral surface of the inertia mass 12 are formed with concavities and convexities corresponding to each other continuously in the circumferential direction, and are compressed between the hub portion 11B and the inertia mass 12 The torsional elastic body 14 that is press-fitted in is formed in a shape that undulates in the radial direction, and is less likely to slip in the axial direction and the circumferential direction.

  The pulley 13 is made of a metal material, and has a pulley main body 21 disposed on the outer peripheral side of the inertial mass 12, and extends radially inward from the front end of the pulley main body 21 and bends inward of the recess 11E. And a front end portion 22 having a horizontal portion 22A extending in parallel with the hub portion 11B. A poly V groove 21a is formed on the outer peripheral surface of the pulley main body 21. A support portion 24 extends radially inward from the horizontal portion 22A of the front end portion 22 at an axially intermediate position between the vertical wall portion 17A of the press-fitting ring 17 and the connecting portion 11C of the hub 11. Between the both ends of the support portion 24 and the inner end of the vertical wall portion 17A of the press-fitting ring 17 and the inner end of the connecting portion 11C of the hub 11, a ring-shaped member having the same thickness that constitutes the rotational fluctuation absorbing elastic body 15. A pair of rubber members 15A and 15B are interposed in a compressed state. The end surfaces of these rubber members 15A and 15B are both ends of the support portion 24, the inner end of the vertical wall 17A of the press-fitting ring 17 and the connecting portion of the hub 11. 11C is adhered and fixed to the inner end of each.

  As described above, the support portion 24 of the pulley 13 is disposed at an intermediate position between the vertical wall 17A of the press-fitting ring 17 and the connecting portion 11C of the hub 11, so that the pulley 13 is a pair of compressed rubber materials having the same thickness. 15A and 15B are sandwiched by an equal elastic force from the front and rear in the axial direction. Thereby, the pulley 13 always receives an equal force from the front and rear in the axial direction, and the pulley 13 is not displaced in the axial direction even if a bearing for positioning in the axial direction is not provided. The pair of rubber materials 15A and 15B constituting the rotational fluctuation absorbing elastic body 15 is made of an elastic material having excellent heat resistance and mechanical strength, and the hub 11 and the pulley 13 are connected via the rotational fluctuation absorbing elastic body 15. The rotational fluctuation of the driving torque input from the crankshaft to the hub 11 is elastically coupled, and is absorbed by the rotational fluctuation absorbing elastic body 15, and the rotation is smoothly transmitted from the hub 11 to the pulley 13.

  A journal bearing 20 is interposed between the inner periphery of the pulley body 21 of the pulley 13 and the outer periphery of the inertia mass 12, and the pulley 13 is concentric with the center of rotation of the crankshaft attached to the hub 11 by the journal bearing 20. In addition to being supported, the inertial mass 12 is supported to be relatively rotatable.

  As shown in FIG. 2, a plurality of (two in the embodiment) engagement holes 25 are formed in the front end portion 22 of the pulley 13 at equal intervals in the circumferential direction. The engaging protrusions 26 protruding from the end face of the hub portion 11B are loosely fitted with appropriate clearances on both sides in the circumferential direction. Thus, a stopper mechanism 27 is configured to limit the relative rotation angle of the pulley 13 with respect to the hub 11 in the circumferential direction to a predetermined range. The stopper mechanism 27 prevents the rotational fluctuation absorbing elastic body 15 from being excessively twisted and broken.

  The rotation fluctuation absorbing damper pulley 10 in the above-described embodiment is rotated together with the crankshaft by attaching the boss portion 11A of the hub 11 to the shaft end of the crankshaft of the engine (not shown). The rotation of the crankshaft is transmitted from the hub 11 to the pulley 13 through the elastic member 15 for absorbing fluctuations of rotation, and further to the auxiliary machine such as an alternator through a V-belt (not shown) wound around the pulley 13. Is done.

  Since the engine converts the reciprocating motion of the piston into the rotational motion of the crankshaft, the crankshaft undergoes periodic rotational fluctuations with the rotation. This rotational fluctuation is caused by the rotational fluctuation absorbing elastic body 15. Absorbed. Therefore, the rotation fluctuation is not transmitted to the pulley 13, and the rotation is smoothly transmitted from the pulley 13 to the auxiliary machinery.

  According to the first embodiment described above, the rotational fluctuation absorbing elastic body 15 is sandwiched between the rubber members 15A and 15B having the same thickness compressed from the front and rear by the equal force, and the pulley 13 is always Since it receives a uniform force from the front and rear, a conventional bearing for positioning the pulley 13 in the axial direction can be eliminated, the number of parts can be reduced, and the durability of the elastic member 15 for absorbing rotational fluctuation can be improved. can do.

  FIG. 3 shows a second embodiment of the present invention. The difference from the first embodiment is that the journal bearing 20 is connected to the inner periphery of the hub portion 11B of the hub 11 and the horizontal portion 22A of the pulley 13. The pulley 13 is directly supported on the hub 11 by being interposed between the outer periphery and the hub 11.

  According to the second embodiment, since the pulley 13 is directly supported by the hub 11, the concentricity of the pulley 13 with respect to the rotation center of the crankshaft is further improved. Since the other points are the same as those of the first embodiment, the same parts are denoted by the same reference numerals and the description thereof is omitted.

  In the above-described embodiment, the pulley 13 is sandwiched between the hub 11 and the front and rear in the axial direction with a uniform elastic force by the rotational fluctuation absorbing elastic body 15 including a pair of rubber materials 15A and 15B having the same thickness. However, the pair of rubber materials 15A and 15B do not have to have the same thickness in a strict sense, and may be any material as long as they can be sandwiched with a uniform elastic force from the front and rear in the axial direction.

  Further, in the above-described embodiment, in order to sandwich the pair of rubber materials 15A and 15B from the front and rear in the axial direction, a press-fitting ring having an L-shaped section having a vertical wall portion 17A is press-fitted into the horizontal wall portion 11D of the hub 11. However, the configuration in which the rubber materials 15A and 15B are sandwiched is not limited thereto, and various modes can be adopted.

  In the above-described embodiment, an example in which the torsional elastic body 14 is press-fitted between the outer peripheral surface of the hub portion 11B and the inner peripheral surface of the inertia mass 12 has been described. It can also arrange | position between the hub part 11B and the inertial mass 12 by another means, such as sulfur adhesion.

It is sectional drawing of the rotation fluctuation | variation absorption damper pulley which shows the 1st Embodiment of this invention. It is the figure seen from the A direction of FIG. It is sectional drawing of the rotation fluctuation absorption damper pulley which shows the 2nd Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Damper pulley, 11 ... Hub, 11A ... Boss part, 11B ... Hub part, 11C ... Connection part, 11D ... Horizontal wall part, 12 ... Inertial mass, 13. ..Pulley, 14 ... elastic body for torsion, 15 ... elastic body for absorbing rotational fluctuation, 15A, 15B ... rubber material, 17 ... press-fitting ring, 17A ... vertical wall, 20 .. Journal bearing, 22... Front end, 22A... Horizontal portion, 24... Support portion, 27.

Claims (4)

  1. An inertial mass is elastically connected to the outer periphery of the hub attached to the rotation shaft via a torsional elastic body, and a pulley that can rotate relative to the inertial mass and the hub are connected via an elastic body for absorbing rotational fluctuations. in damper pulley which is elastically connected, the torque fluctuation damping elastic body sandwiched with equal elastic forces from the front and rear in the axial direction of the pulley relative to the hub by a pair of rubber material, and said and said pulley hub The hub is elastically connected , and the hub connects a cylindrical boss portion, a cylindrical hub portion concentrically positioned on the outer peripheral side of the boss portion, and the boss portion and the hub portion. The connecting portion and a wall portion projecting from the boss portion, and a ring having a wall portion facing the connecting portion in the axial direction is fixed to the wall portion of the hub portion. Is the link of the hub portion. A support portion is provided between the wall portion of the ring and the ring portion, and the pair of rubber members are provided between both sides of the support portion in the axial direction, the connecting portion of the hub portion, and the wall portion of the ring. A rotational fluctuation absorbing damper pulley characterized by being bonded and fixed .
  2.   2. The rotation fluctuation absorbing damper pulley according to claim 1, wherein the pair of rubber materials of the rotation fluctuation absorbing elastic body are made of a rubber material having the same thickness.
  3. The rotation fluctuation absorbing damper pulley according to claim 1 or 2 , wherein the pulley is rotatably supported in a radial direction by a journal bearing interposed between the inertia mass or the hub.
  4. In any one of claims 1 to 3, wherein the wall portion of the hub portion is composed of a horizontal wall portion extending parallel to the hub portion, said ring is press-fitted into the horizontal wall portion, The wall portion of the ring includes a vertical wall portion that is axially opposed to the connection portion of the hub portion, and the support portion of the pulley is an intermediate in the axial direction between the connection portion of the hub portion and the vertical wall portion. A rotational fluctuation-absorbing damper pulley characterized by being provided so as to extend radially inward at a position.
JP2005147616A 2005-05-20 2005-05-20 Rotation fluctuation absorbing damper pulley Expired - Fee Related JP4572739B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005147616A JP4572739B2 (en) 2005-05-20 2005-05-20 Rotation fluctuation absorbing damper pulley

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2005147616A JP4572739B2 (en) 2005-05-20 2005-05-20 Rotation fluctuation absorbing damper pulley
US11/434,178 US7850557B2 (en) 2005-05-20 2006-05-16 Torque fluctuation damper pulley
DE200660010761 DE602006010761D1 (en) 2005-05-20 2006-05-17 Pulley with damping element for damping torque fluctuations
EP20060114080 EP1724496B1 (en) 2005-05-20 2006-05-17 Torque fluctuation damper pulley

Publications (2)

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JP2006322573A JP2006322573A (en) 2006-11-30
JP4572739B2 true JP4572739B2 (en) 2010-11-04

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US (1) US7850557B2 (en)
EP (1) EP1724496B1 (en)
JP (1) JP4572739B2 (en)
DE (1) DE602006010761D1 (en)

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JPH04249635A (en) * 1990-12-28 1992-09-04 Tokai Rubber Ind Ltd Dual type damper
JP2001159448A (en) * 1999-11-30 2001-06-12 Fukoku Co Ltd Isolation damper pulley

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EP1724496B1 (en) 2009-12-02
EP1724496A1 (en) 2006-11-22
US20060264282A1 (en) 2006-11-23
US7850557B2 (en) 2010-12-14
DE602006010761D1 (en) 2010-01-14
JP2006322573A (en) 2006-11-30

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